Tu Bergakademie Freiberg, Inst Mining & Special Civil Eng
Abstract
Proceedings IMWA 2016, Freiberg/Germany | Drebenstedt, Carsten, Paul, Michael (eds.) | Mining Meets Water – Conflicts and Solutions.The current study is focused on AMD-precipitates that compose the typical magnesium and aluminum
sulfate assemblages in the Spanish sector of the Iberian Pyrite Belt (SW Spain). The main objectives
are identify and describe the composition, morphology and paragenetic relationships of these sulfate
phases.
From the methodological pint of view, sampling procedure covered the entire metallogenetic province,
including five selected representative mines and eight river basins, which are the main receptors of the
acid mine drainage discharges. The mineralogical analyses were performed by X-Ray diffraction and
electron microscopy. The obtained results showed the extraordinary abundance of aluminum sulfates
with acicular habit, from the series pickeringite-apjhonite-halotrichite. They form typical assemblages
with other aluminum sulfates, such as alunogen and tamarugite, and with the Mg sulfates: epsomite
and hexahydrite. Moreover, the paragenetic relationships indicate the late occurrence of acicular Alsulfates
from the halotrichite group.Financial support for this research was provided by the Andalusian Autonomous Government Excellence
Project, code P06-RNM-02167. This work was also co-funded by the European Union through the European
Regional Development Fund, based on COMPETE 2020 (Programa Operacional da Competitividade e Internacionalização), project ICT (UID/GEO/04683/2013) with reference POCI-01-0145-FEDER-007690 and
national funds provided by Fundação para a Ciência e Tecnologia.info:eu-repo/semantics/publishedVersio
